| Acronym | Definition |
|---|
| GMC | General Motors Corporation (automotive) |
| GMC | General Medical Council |
| GMC | Gospel Music Channel (TV network) |
| GMC | GMC Software Technology |
| GMC | Green Mountain College (Poultney, Vermont) |
| GMC | Green Mountain Club (Vermont) |
| GMC | General Mills Cereals (Minneapolis, MN) |
| GMC | Global Management Challenge (est. 1980; competition) |
| GMC | Gwynedd-Mercy College (Gwynedd Valley, PA) |
| GMC | Georgia Military College (Milledgeville, GA) |
| GMC | Green Music Center (Sonoma State University; California) |
| GMC | Glucose-Methanol-Choline (enzyme family) |
| GMC | Guild of Master Craftsmen |
| GMC | Geiger-Muller Counter (particle detector) |
| GMC | General Management Committee (various organizations) |
| GMC | Grand Master of C++ |
| GMC | Grid Management Charge |
| GMC | Group Matrix Card |
| GMC | General Motors Corporation |
| GMC | Gun Motor Carriage (Self-Propelled Gun) |
| GMC | Greater Metro Conference (high school athletics conference) |
| GMC | Global Motion Compensation |
| GMC | Gulf Medical College (Ajman, UAE) |
| GMC | Glendive Medical Center (Glendive, MT) |
| GMC | Game Maker Community |
| GMC | Gleneagles Medical Centre (Malaysia) |
| GMC | Génie Mécanique (baccalauréat en génie mécanique) |
| GMC | Goodwyn, Mills and Cawood, Inc (firm; various locations) |
| GMC | General Military Course |
| GMC | Giant Molecular Cloud |
| GMC | Guard Mother Cell |
| GMC | Geisinger Medical Center (Danville, PA) |
| GMC | Godmanchester (UK) |
| GMC | Gritman Medical Center (Moscow, ID) |
| GMC | General Mortgage Corporation (San Diego, CA) |
| GMC | Growth Management Committee (various organizations) |
| GMC | General Medical Condition |
| GMC | Get Money Clique |
| GMC | Greater Manchester County (UK) |
| GMC | Grant Medical College |
| GMC | Guyana Marketing Corporation |
| GMC | George Mason College (now George Mason University; Virginia) |
| GMC | Genetically Modified Crop |
| GMC | Guangzhou Medical College (est. 1958; China) |
| GMC | Generic Model Control |
| GMC | Guwahati Medical College (India) |
| GMC | Generalized Method of Cells (micromechanics of materials theory) |
| GMC | Green Marketing Coalition |
| GMC | Grid Management Charge (FERC) |
| GMC | Great Muppet Caper (movie) |
| GMC | Generalized Multi-Carrier |
| GMC | Gold Master Candidate |
| GMC | Gold Medal Champion |
| GMC | Grupo Media Capital (Portugal) |
| GMC | George Morris Center (Canada) |
| GMC | Gravimetric Moisture Content (soil water content) |
| GMC | Gunner's Mate, Chief (USN Rating) |
| GMC | Ground Movement Controller |
| GMC | GoodLink Management Console |
| GMC | Global Media Corporation |
| GMC | Giant Migratory Contraction |
| GMC | Guangdong Mobile Corp (China) |
| GMC | Game Marketing Conference |
| GMC | Greater Manchester Collections |
| GMC | Growth Monitoring and Counseling (Malawi) |
| GMC | General Matters Conference |
| GMC | Group Matrix Card (Cisco) |
| GMC | Grand Master Chef |
| GMC | Generalized Multi-Code |
| GMC | Glen Mhor Camp (Canada) |
| GMC | GETS Management Center (Sprint) |
| GMC | Grenoble Maquette Club (French: Grenoble Model Club; Grenoble, France) |
| GMC | Gun Mount Captain |
| GMC | Giraffe Meat Crew |
| GMC | Griffon Maquette Club (French: Griffon Model Club) |